Problem with list in config

This is my code
If i do /join <guild>
Then add me to players
But older player remove

Code:java

else if(args[0].equalsIgnoreCase("join")){
List<String> players= getConfig().getStringList("Guilds." + args[1]+".Players");
players.add(p.getName());
Config.getConfig("g").set("Guilds." + args[1] + ".Players", players);
Config.saveAll();
p.sendMessage("You join to guild named" + args[1] + " !");
}

Solved
I don't use Config.getConfig();

EDIT by Moderator: merged posts, please use the edit button instead of double posting.